Pausing .gif Images

I few months ago I read something that showed how to pause .gif images on a web page. It was a simple key combination for Windows OS. If anyone could tell me what it is i would really appreciate it. I need it just to get through a thread sometimes.

press esc

Just hit Esc

Edit: I had proper grammar and ONE MORE WORD.

Wow, really? I thought it was something more complicated than that. Thanks guys!

crap i stopped my avatar =(